package com.yonyou.pmclouds.basecom.view;

import org.springframework.core.MethodParameter;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

/**
 * 将responsebody返回的对象，自动包装成wrapviewobject<br>
 * 这里string需要特殊处理，因为string需要返回string类型的才可以
 * <br>JsonView在出现jsonview时，风险未知
 */
@ControllerAdvice
@Order(value = Ordered.HIGHEST_PRECEDENCE)
public class AutoWrapResposeBodyAdvice implements ResponseBodyAdvice<Object> {
    @Override
    public boolean supports(MethodParameter returnType, Class<? extends HttpMessageConverter<?>> converterType) {
        return AbstractJackson2HttpMessageConverter.class.isAssignableFrom(converterType) && !WrapViewObject.class.isAssignableFrom(returnType.getParameterType()) && !returnType.hasMethodAnnotation(DisableWrap.class);
    }

    @Override
    public Object beforeBodyWrite(Object body, MethodParameter returnType, MediaType selectedContentType, Class<? extends HttpMessageConverter<?>> selectedConverterType, ServerHttpRequest request, ServerHttpResponse response) {
        if (body instanceof WrapViewObject) {
            return body;
        }
        return new OkWrapViewObject<>(body);
    }
}
